Amakusa climate — normals and trends

Q: What is the climate of Amakusa?

Amakusa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 2,001 mm of precipitation per year.

Q: What is the hottest day ever recorded in Amakusa?

The hottest day measured in Amakusa between 1940 and 2025 was 17 July 1994, reaching 39.2 °C.

Q: What is the coldest day in Amakusa?

The coldest day measured in Amakusa between 1940 and 2025 was 26 February 1981, at -3.4 °C.

Q: Does it snow in Amakusa?

Yes. Amakusa gets on average 1.9 cm of snow per year and has around 3 frost days.

Q: Has the climate of Amakusa warmed?

Yes: Amakusa warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Amakusa?

The wettest day measured in Amakusa between 1940 and 2025 was 19 July 1976, with 190 mm of rain in 24 hours.

Q: What was the windiest day in Amakusa?

The windiest day measured in Amakusa between 1940 and 2025 was 27 September 1991, with winds reaching 77.8 km/h.

Q: What is the warmest month in Amakusa?

The warmest month in Amakusa is August (28.0 °C on average); the coldest is January (7.3 °C).

Q: How much does it rain in Amakusa?

Amakusa receives on average 2,001 mm of precipitation per year, spread over about 146 rainy days.

Q: Is it sunny in Amakusa?

Amakusa gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.

Amakusa (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.5 °C and it receives 2,001 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is August (28.0 °C on average) and the coldest is January (7.3 °C). Rainfall peaks in June.

Amakusa averages 3 frost days, 56 hot days (≥ 30 °C) and 146 rainy days per year.

Amakusa has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.

The number of frost days there went from about 5 to 1 per year over the period.

The hottest day of the period reached 39.2 °C (on 17 July 1994) and the coldest -3.4 °C (on 26 February 1981).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

AmakusaKumamoto

coords: 32.46°, 130.19°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthJanuary

Mean daily temperature

17.5°C

Average daily high

21.1°C

Average daily low

14.2°C

Annual rainfall

2,001mm

Sunshine / day

8.2h

Mean relative humidity

73%

Average peak wind

15.1km/h

Seasonal range

20.7°C

Frost days (< 0 °C)

3 d/yr

Hot days (≥ 30 °C)

56 d/yr

Rainy days (≥ 1 mm)

146 d/yr

Annual snowfall

1.9 cm

Average feels-like high

21.7 °C

Average feels-like low

13.8 °C

Average peak gust

37.3 km/h

Tropical nights (≥ 20 °C)

106 d/yr

Solar radiation

14.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.76 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

39.2 °C

17 July 1994

Coldest day

-3.4 °C

26 February 1981

Wettest day

190 mm

19 July 1976

Windiest day

77.8 km/h

27 September 1991

Strongest gust

196.6 km/h

27 September 1991

Hottest feels-like

45.5 °C

5 August 2024

Coldest feels-like

-9.8 °C

26 February 1981

Snowiest day

13.2 cm

18 January 1984

Sunniest day

13.7 h

12 June 1951

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.0 °C29 July 2025	-1.8 °C25 February 2025	18.4 °C	1,754 mm	100	7
2024	38.9 °C4 August 2024	0.9 °C23 December 2024	19.5 °C	2,621 mm	89	0
2023	37.6 °C6 August 2023	-2.2 °C25 January 2023	18.9 °C	2,232 mm	82	3
2022	36.0 °C29 July 2022	-0.3 °C19 January 2022	18.6 °C	1,586 mm	78	1
2021	36.8 °C5 August 2021	-1.6 °C9 January 2021	18.8 °C	2,394 mm	88	5
2020	35.3 °C18 August 2020	0.4 °C31 December 2020	18.4 °C	2,436 mm	53	0
2019	36.0 °C8 August 2019	1.4 °C27 January 2019	18.6 °C	2,115 mm	60	0
2018	39.1 °C14 August 2018	-2.0 °C27 January 2018	18.5 °C	2,133 mm	73	8
2017	36.8 °C4 August 2017	-0.8 °C25 January 2017	18.0 °C	1,932 mm	69	2
2016	38.8 °C23 August 2016	-2.7 °C24 January 2016	18.9 °C	2,875 mm	78	2
2015	35.8 °C7 August 2015	0.8 °C9 February 2015	18.2 °C	2,604 mm	39	0
2014	36.3 °C30 July 2014	-0.2 °C19 December 2014	17.9 °C	2,086 mm	38	1
2013	37.0 °C21 August 2013	0.2 °C8 February 2013	18.5 °C	2,066 mm	84	0
2012	36.6 °C5 August 2012	-1.6 °C2 February 2012	17.9 °C	2,338 mm	55	3
2011	38.2 °C4 August 2011	-2.0 °C16 January 2011	18.2 °C	1,969 mm	77	1
2010	35.5 °C4 September 2010	0.7 °C13 January 2010	18.4 °C	2,347 mm	66	0
2009	36.1 °C6 August 2009	-0.3 °C24 January 2009	18.6 °C	1,538 mm	69	1
2008	38.8 °C6 August 2008	0.3 °C18 February 2008	18.3 °C	2,030 mm	68	0
2007	35.7 °C21 September 2007	-1.0 °C3 February 2007	19.0 °C	1,775 mm	81	1
2006	36.4 °C8 August 2006	0.4 °C5 February 2006	18.4 °C	2,350 mm	53	0
2005	36.0 °C25 July 2005	-1.0 °C18 December 2005	17.9 °C	1,490 mm	69	2
2004	37.0 °C27 August 2004	-0.9 °C22 January 2004	18.7 °C	2,168 mm	75	1
2003	35.3 °C6 August 2003	0.2 °C5 January 2003	18.4 °C	1,986 mm	58	0
2002	34.4 °C17 August 2002	1.9 °C16 February 2002	18.4 °C	1,637 mm	69	0
2001	36.4 °C18 August 2001	-1.1 °C17 February 2001	18.3 °C	2,158 mm	67	2
2000	35.1 °C12 August 2000	0.8 °C9 February 2000	18.0 °C	1,993 mm	59	0
1999	34.4 °C9 August 1999	0.1 °C4 February 1999	18.1 °C	2,020 mm	53	0
1998	36.0 °C19 September 1998	-0.3 °C25 January 1998	19.1 °C	2,062 mm	84	1
1997	35.9 °C2 September 1997	0.2 °C23 January 1997	18.1 °C	2,106 mm	57	0
1996	38.4 °C12 August 1996	-1.1 °C11 February 1996	17.7 °C	1,690 mm	65	2
1995	35.5 °C23 August 1995	-1.3 °C31 December 1995	17.2 °C	1,972 mm	53	2
1994	39.2 °C17 July 1994	-0.6 °C24 January 1994	18.7 °C	1,332 mm	83	1
1993	33.7 °C8 August 1993	0.1 °C3 February 1993	17.2 °C	3,165 mm	25	0
1992	34.9 °C28 August 1992	0.6 °C2 February 1992	17.8 °C	1,971 mm	52	0
1991	35.1 °C19 August 1991	-1.9 °C22 February 1991	17.6 °C	2,536 mm	56	4
1990	36.0 °C31 July 1990	-1.9 °C24 January 1990	18.3 °C	2,220 mm	74	4
1989	34.7 °C4 August 1989	0.8 °C28 January 1989	18.1 °C	2,033 mm	57	0
1988	35.8 °C9 August 1988	-0.1 °C4 February 1988	17.4 °C	2,037 mm	49	1
1987	34.3 °C29 August 1987	-0.5 °C3 March 1987	17.6 °C	2,350 mm	45	1
1986	35.6 °C15 August 1986	-1.5 °C25 February 1986	17.2 °C	1,911 mm	50	5
1985	37.9 °C29 August 1985	-1.4 °C31 January 1985	17.6 °C	1,885 mm	59	5
1984	37.2 °C9 August 1984	-2.1 °C6 January 1984	17.1 °C	1,654 mm	54	7
1983	34.7 °C5 August 1983	-2.2 °C14 February 1983	17.6 °C	2,193 mm	48	6
1982	33.2 °C24 August 1982	-1.3 °C30 January 1982	17.4 °C	2,000 mm	36	2
1981	34.0 °C29 August 1981	-3.4 °C26 February 1981	17.0 °C	1,744 mm	53	3
1980	32.4 °C20 July 1980	-0.6 °C19 January 1980	16.8 °C	2,493 mm	22	5
1979	35.3 °C16 August 1979	0.9 °C2 February 1979	17.3 °C	2,407 mm	58	0
1978	36.1 °C28 July 1978	-1.1 °C11 January 1978	17.7 °C	1,499 mm	75	3
1977	33.9 °C28 July 1977	-3.0 °C16 February 1977	17.4 °C	2,227 mm	52	11
1976	33.6 °C20 August 1976	-2.1 °C24 January 1976	16.7 °C	2,588 mm	40	6
1975	34.6 °C4 August 1975	-0.2 °C24 February 1975	17.4 °C	2,126 mm	53	2
1974	35.6 °C19 August 1974	-1.5 °C28 February 1974	16.8 °C	1,710 mm	45	4
1973	35.4 °C16 July 1973	-0.5 °C14 December 1973	17.3 °C	1,875 mm	57	2
1972	34.6 °C17 August 1972	0.8 °C1 March 1972	17.2 °C	2,682 mm	41	0
1971	35.3 °C1 August 1971	-0.8 °C5 January 1971	17.2 °C	2,215 mm	49	2
1970	35.3 °C12 August 1970	-1.2 °C18 January 1970	16.9 °C	2,042 mm	54	5
1969	35.7 °C18 August 1969	-1.2 °C16 January 1969	17.1 °C	2,046 mm	57	4
1968	34.9 °C13 August 1968	-0.7 °C12 February 1968	16.9 °C	2,112 mm	49	5
1967	37.3 °C1 September 1967	-2.1 °C16 January 1967	17.5 °C	1,586 mm	82	10
1966	35.8 °C8 August 1966	-1.5 °C6 February 1966	16.8 °C	2,200 mm	46	4
1965	33.7 °C4 August 1965	-0.6 °C3 February 1965	16.0 °C	2,058 mm	28	2
1964	35.8 °C17 August 1964	-1.9 °C14 February 1964	17.8 °C	1,915 mm	71	1
1963	33.8 °C2 August 1963	-1.2 °C16 January 1963	16.8 °C	1,890 mm	57	10
1962	35.2 °C30 July 1962	0.4 °C27 February 1962	16.8 °C	2,134 mm	50	0
1961	34.9 °C21 July 1961	-1.3 °C18 January 1961	17.7 °C	1,790 mm	84	11
1960	37.7 °C21 August 1960	-1.3 °C13 February 1960	17.4 °C	1,681 mm	67	8
1959	35.7 °C3 August 1959	-1.6 °C17 January 1959	17.5 °C	2,076 mm	56	8
1958	35.5 °C22 July 1958	-0.1 °C4 January 1958	17.5 °C	1,778 mm	65	1
1957	34.7 °C17 August 1957	-0.9 °C15 March 1957	16.5 °C	2,349 mm	36	8
1956	36.7 °C4 August 1956	-2.2 °C13 March 1956	16.5 °C	2,002 mm	51	10
1955	34.6 °C14 August 1955	-1.2 °C8 January 1955	17.3 °C	1,810 mm	53	8
1954	36.4 °C15 August 1954	-0.4 °C23 February 1954	17.4 °C	2,095 mm	45	3
1953	35.5 °C15 August 1953	-1.7 °C17 January 1953	17.1 °C	2,175 mm	55	2
1952	33.5 °C15 August 1952	-1.6 °C6 February 1952	16.6 °C	2,047 mm	40	3
1951	35.7 °C16 August 1951	-0.5 °C8 February 1951	16.6 °C	1,997 mm	36	1
1950	33.7 °C17 July 1950	0.1 °C7 January 1950	16.6 °C	1,677 mm	32	0
1949	33.1 °C9 August 1949	0.2 °C16 January 1949	16.4 °C	2,088 mm	21	0
1948	32.3 °C10 August 1948	0.4 °C30 January 1948	16.8 °C	1,956 mm	19	0
1947	32.1 °C13 August 1947	-1.9 °C16 February 1947	15.6 °C	1,294 mm	38	3
1946	36.2 °C26 July 1946	-0.6 °C10 January 1946	16.7 °C	1,267 mm	36	1
1945	33.8 °C1 August 1945	-0.5 °C17 January 1945	16.1 °C	2,320 mm	33	2
1944	32.7 °C3 September 1944	0.1 °C16 February 1944	16.4 °C	1,298 mm	45	0
1943	32.0 °C15 August 1943	-1.1 °C12 January 1943	16.2 °C	1,173 mm	17	1
1942	37.0 °C1 August 1942	-2.1 °C13 February 1942	16.5 °C	1,075 mm	63	8
1941	33.6 °C7 August 1941	-2.0 °C1 February 1941	16.2 °C	1,386 mm	20	7
1940	32.2 °C30 July 1940	-1.0 °C26 January 1940	15.9 °C	1,398 mm	25	5

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

22.5 °C

+1.4 °C

Hot days (≥ 30 °C)

100 d/yr

+44

Frost days (< 0 °C)

7 d/yr

Annual rainfall

1754 mm

-247 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	11.0 °C	+0.5 °C	32 mm	-33 mm
Feb	10.1 °C	-1.6 °C	60 mm	-26 mm
Mar	16.4 °C	+1.2 °C	149 mm	+24 mm
Apr	20.9 °C	+0.8 °C	100 mm	-57 mm
May	24.0 °C	+0.1 °C	285 mm	+89 mm
Jun	28.1 °C	+1.7 °C	384 mm	-6 mm
Jul	33.8 °C	+3.6 °C	99 mm	-234 mm
Aug	32.9 °C	+1.1 °C	241 mm	+50 mm
Sep	31.1 °C	+2.4 °C	207 mm	+10 mm
Oct	26.8 °C	+3.0 °C	105 mm	+1 mm
Nov	19.1 °C	+0.7 °C	31 mm	-58 mm
Dec	15.0 °C	+2.1 °C	62 mm	-7 mm

The year's extremes

Hottest day

37.0 °C

29 Jul 2025

Coldest day

-1.8 °C

25 Feb 2025

Wettest day

80.4 mm

27 Mar 2025

Windiest day

34.8 km/h

14 Apr 2025

Strongest gust

85.3 km/h

16 Jun 2025

Hottest feels-like

42.8 °C

8 Jul 2025

Coldest feels-like

-6.7 °C

8 Feb 2025

Snowiest day

0.2 cm

10 Jan 2025

Sunniest day

13.6 h

5 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Amakusa?

Amakusa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 2,001 mm of precipitation per year.

What is the hottest day ever recorded in Amakusa?

The hottest day measured in Amakusa between 1940 and 2025 was 17 July 1994, reaching 39.2 °C.

What is the coldest day in Amakusa?

The coldest day measured in Amakusa between 1940 and 2025 was 26 February 1981, at -3.4 °C.

Does it snow in Amakusa?

Yes. Amakusa gets on average 1.9 cm of snow per year and has around 3 frost days.

Has the climate of Amakusa warmed?

Yes: Amakusa warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Amakusa?

The wettest day measured in Amakusa between 1940 and 2025 was 19 July 1976, with 190 mm of rain in 24 hours.

What was the windiest day in Amakusa?

The windiest day measured in Amakusa between 1940 and 2025 was 27 September 1991, with winds reaching 77.8 km/h.

What is the warmest month in Amakusa?

The warmest month in Amakusa is August (28.0 °C on average); the coldest is January (7.3 °C).

How much does it rain in Amakusa?

Amakusa receives on average 2,001 mm of precipitation per year, spread over about 146 rainy days.

Is it sunny in Amakusa?

Amakusa gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.

What is the biggest single-day snowfall in Amakusa?

The heaviest 24-hour snowfall measured in Amakusa between 1940 and 2025 was 18 January 1984, with 13.2 cm.

Are there tropical nights in Amakusa?

Yes: Amakusa has on average 106 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Amakusa?

In Amakusa, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 5 August 2024, and the lowest was -9.8 °C on 26 February 1981.

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